How To make an object flicker between alpha values?

Hey Guys! I'm assigning a transparent material(Custom Material) to my character on collision with 0.3 alpha value. I want to if there is way I can make it flicker between alpha =0.3f and alpha =1.0f . I've tried using Mathf.PingPong, but it didn't work for me. I've tried many things but not able to achieve the effect i want.

I want the flickering effect as you guys might have seen in many video games when a player gets hit by anything. Please Help Me. Thank You.

 

did you use a coroutine? or did you try to use this inside the oncollision() function?

if you want the effect to happen over time you'll need to call a coroutine. oncollision is only called for the single frame the collision happens.

 

I'm calling it inside OnCollision method. This is how i'm calling it

void OnCollisionEnter(Collision collision)
{
if (collision.gameObject.tag == "Vehicle")
{

if (collision.collider.GetType()== typeof(CapsuleCollider) playerTotalHealth >= 10) {
int reducedPlayerHealth = playerTotalHealth - amountOfHealthLossOnCollision;
playerTotalHealth = reducedPlayerHealth;
playerHealth.guiText.text = reducedPlayerHealth.ToString();

PlayerOnCollision();
}

}
}

PlayerOnCollision function handles the alpha change.

What do you suggest I should do?

 

You've omitted the part that would contain the problem. Can you post PlayerOnCollision?

Also, use [co de] [/co de] tags.

 

Code (csharp):

1.  
2. // I have not checked your OnCollisionEnter code.
3. // I assume it works.
4. void OnCollisionEnter(Collision collision) {
5.   if (collision.gameObject.tag == "Vehicle") {
6.     if (collision.collider.GetType()== typeof(CapsuleCollider)  playerTotalHealth >= 10) {
7.       int reducedPlayerHealth = playerTotalHealth - amountOfHealthLossOnCollision;
8.       playerTotalHealth = reducedPlayerHealth;
9.       playerHealth.guiText.text = reducedPlayerHealth.ToString();
10.       PlayerOnCollision();
11.     }
12.   }
13. }
14.  
15. void PlayerOnCollision() {
16.   // flicker for one second into the future
17.   flickerEndTime = Time.time + 1f;
18. }
19.  
20. void Update() {
21.   if (Time.time < flickerEndTime) {
22.     Color flashAlpha = renderer.material.color;
23.     // PingPong between 0.3 and 1;
24.     flashAlpha.a = 0.3f + Mathf.PingPong(Time.time, 0.7f);
25.     // Assuming your renderer is on this.gameObject!
26.     renderer.material.color = flashAlpha;
27.   }
28.   else {
29.     renderer.material.color = Color.white;
30.   }
31. }
32.  
33. /// If this is in the future, we are flickering.
34. float flickerEndTime { get; set; }
35.  

 

Here's my code for PlayerOnCollision

Code (csharp):

1.  
2. void PlayerOnCollision()
3. {
4. BroadcastMessage("MakeTransparent", 0.3f, SendMessageOptions.DontRequireReceiver);
5. }
6.  

Coz the playerScript, I mean the above script is attached to a parent object which doesn't have a renderer component.

this message is received by the rendererScript attached to the children with the renderer component attached and goes like this

Code (csharp):

1.  
2.  
3. private Material currentMaterial;
4.     public Material transparentMaterial;
5.     private Texture currentTexture;
6.  
7.     void Start()
8.     {
9.         currentMaterial = gameObject.renderer.material;
10.         currentTexture = gameObject.renderer.material.mainTexture;
11.     }
12.  
13.     void MakeTransparent(float alphaTransparent)
14.     {
15.         gameObject.renderer.material = transparentMaterial;
16.         gameObject.renderer.material.color = new Color(renderer.material.color.r, renderer.material.color.g, renderer.material.color.b, alphaTransparent);
17.         gameObject.renderer.material.SetTexture("_MainTex",currentTexture);
18.     }
19.  
20.     void MakeVisible(float alphaVisible)
21.     {
22.         gameObject.renderer.material = currentMaterial;
23.         gameObject.renderer.material.color = new Color(renderer.material.color.r, renderer.material.color.g, renderer.material.color.b, alphaVisible);
24.     }
25.  
26.  

Hope this helps in finding the solution.